Features:Over-load protectionShort circuit protectionProtection from the lightning strikeUnder-voltage protectionOver-charging protectionMicrocontroller digital accuracy16 field adjustable lighting control optionsDetects day and night using the PV arraySuitable for all 12/ 24 V DC lampsSuitable for Seal lead acid batteryWorking Temperature: -20℃-50℃Size: Approx. 10.3x9.5x4cm/ 4.06x3.74x1.57"Package Included:1 x 12V/ 24V 20A Solar Charge Controller1 x User Manual